Syringe renovator



April 30, 1935.

y K, w. NlcKl-:RSON

SYRINGE RENOVATOR 2 Sheets-Sheet l Ffiled July 2, 1934 nventor A, N @m5 April 30, 1935. l K. w. NICKERsoN 1,999,571

' SYRINGE RENovAToR Filed July 2, 1934 2 sheets-sheet 2 Gttorneg L Patented Apr.V 30, 1935 UNITED; [PATENT FFICE d V'-1,99s` ,'5717 y' y ,Y

` Y jsYmNGERENovAToR v Kenneth "W. Nickersn, DahamMass. Application July 2, 1934, serial No. 733,482 v 401mm.' (el. 12a-234)v My present invention relatesrtol aA syringe renofk n vator or hydraulic pressure instrumentv that is manually operated in-,freeing frozenior stuck plungers or rpistons of syringes.

l As is well known to those skilledlinthepraci s principles rof my invention'. It will be under tice of surgery, hospital work, and in other fields where syringes are employed,.the plunger,-piston,

t or the ejector of the pistontype ofv syringe, fre` quently becomes frozen or stuck in the barrel or cylinder of the syringe. yUnder such y conditionspextreme diiculty is encountered yinV attemptingto free the frozen, or stuck plunger, especially in the use of glass hypodermic syringes,

which because ofthe fragilel material employed in their constructiomare easily broken.

The primary object of rmy invention is the provision of means whereby the frozen-or stuck ejector, piston, or plunger of thesyringe` may,

with facilityfand reliability, be freed from thev walls of the cylinder without danger any part of the instrument.`

of breaking In carrying out my invention I `utilize' a portable apparatus'of the hydraulic-'pressure type, which is manually controlled rto gradually build vup in the cylinder a pressure that against the frozen or stuck piston-for theY latter from purpose of releasing or freeing the the walls of the cylinder. The invention consists in .certain is imposed novel com-y binations and arrangements of parts'forperforming the above functions, as will hereinafter be more fully'set forth and claimed.- `companying drawings I have illustrat InV the aced one complete example of the physical embodiment of my r invention wherein the parts are combined and arranged according to one mode I have thus far devised for the practical application ofthe my invention. f n y Figure 1 is a plan *view` showing mentor apparatus, with parts in position ready ,the instru'- for use, thecover or lid being omitted, and 'parts brokenaway, for convenience of illustration.V

Figure 2' is an enlarged, longitudinal,kr sectional view showing the coupling Abetween the "syringe and the hydraulic-pressure instrument or device.

Figure 3, Figure 4, and Figure 5,

tively, transverse sectional views .at 4-4,.and 5-'5 yof la' are, respec- .lines a+-3.,

'course within the cylinder.

y against the upper half 'of the syringe'tov prevent Figure 6 is a viewin side elevation showing the hydraulic'pressure vdevice and its coupling.

Figure 7 is a transverse sectional view at line '1*-7 of Figure 2. f

As illustrated in Figure `1 vthe various partsV of `5 the portable apparatus are mounted upon a'base 'block l of `rectangular shape and of suitablesize, randacover or lid 2 is hinged to the block at y3, for protection vof the parts when the apparatus is not in use. A base plated, of brass or other l0 suitable'material, is secured to the `base block, and these parts may be finished inappropriate and convenient manner. I Y v Forthe purposeof 'illustrating the utilitycof my invention I have vshownaI well known type of glass, hypodermic-syringe, 'havingn a barrel "or cylinder y5, and in which it is assumed that the glass plunger, or ejectorv 6, is stuck or frozen Y near the taperingnozzle 'Iof the syringe, andof Means` are rmounted near one end of the base and base-plate for supporting and retaining the glasssyringe in position in order that the frozen plunger may be freed, which means includes .a holder or saddlehblock 8 having a semi-circular groove!) in its upper face adaptedto receive the glass cylinder 5 of the syringe, and provide a rsolid .support forthe glass tube of the instrument. 'I'he syringe is placed in the saddle-block,iwith the nozzle 1 pointing toward the center of the base, and while supported therein, the syringe isk retained against displacement, preferably by pressure of the hand against a clamp frame I0, which is hinged at Il at one side of thegsaddle block 8. Theclamp frame is semi-circular in cross section and complementary in shape to the syringe., and preferably it is fashioned vwith a Vscreen-body 40a of wire-mesh, 'in order to insure flexibility of the retaining frame, as the latter is manually pressed y 40 its displacement when the device is being operated.` Near one end ofthe clamp-frame van enlarged, semi-circular head I2 may be fashioned to' viit over the usual annular flange I3 of the syringe, .and this confinement of the flange within the "head on the clamp-frame assists in holding the syringe in place, under manual pressure on the clamp frame, while the hydraulic pressure is being applied for freeing the frozen plunger of the syringe. Before locating'the syringe in its hold- 50 Ver, the clamp frame is turned back on its hinge, as indicated in dotted lines Figure 4, to permit placing of the syringe inthe holder, and then the clamp frame is turned back to full line position indicated in Figures-1 and 4. By ypressure of 55 the left hand on the flexible clamp frame, the syringe is rigidly held in its holder or support against longitudinal displacement when the hydraulic pressure is applied to the p1 nger or the syringe.

As a part or" the hydraulic-pressure device, I may utilize any well known type of suction-ejector syringe suitable for the purpose, as for instance the metal instrument best illustrated in Figures l and 6, but it will be understood that changes may be made in this part of the apparatus, as well as in other parts, when necessary or desirable. As illustrated in the drawings I use a hydraulic cylinder M, having the two enlarged heads l5 and i3; the piston stein Il, and. its piston i8 within the cylinder, and the stem. isprovided with a usual exterior head lil, at its outer end.

The cylinder as best seen in Figure 2 is provided with an exteriorly threaded nozzle 2C, and the nozzle of the hydraulic cylinder is rigidly connected with the tapered nozzleof the glass syringe by rneans of the coupling of the luier-type, as 2|. 'iis coupling has a Tapered attaching nipple with an inner screw thread, and the latter is threaded on the exterior threads of the nozzle 25J of the cylinder, packing gaskets as 23 being located in the head i5 of the cylinder, around the threaded joint to insure an airtight and watertight joint between the coupling and the nozzle.

One end of the coupling has a tapered bore 24- complernentary to the tapered nozzle 'l of the glass syringe, and a close frictional joint is made between the coupling and the nozzle by first slipping the nozzle into the tapered coupling for close frictional contact therewith, after which, a slight turn of one part With relation to the other part, rmly secures these parte in close airtight and watertight relation.

For the support of the hydraulic pressure device I employ a second saddle block 25, which is secured firmly to the base plate 4, and this block, in its upper face, is provided with a recess` or groove 26 of semi-circular shape, conforming to the curvature of the cylinder lll, and alined axially, with the groove or recess of the first block or syringe-holder. As shown in Figure l the holder for the hydraulic pressure device is located at the approximate center ofthe base block, and the groove or recess 25 of the saddle block is of required length to accommodate the cylinder, with the two heads l5 and i6 forming retainingr collars at the opposite ends of the block.

For retaining the hydraulic cylinder l in its support, I employ a spring clamp plate 2l having one edge rigidly secured to or integral with a spring blade 2S, and one end of the latter is rigidly secured to the saddle block 25 at one side of the groove of the block. The clamp plate extends transversely of the saddle block, and of semi-circular shape to iit closely against the upper part of the cylinder l 4, and one of its arcuate edges forms an abutment against which the head i6 of the cylinder i4 impinges, when the hydraulic pressure is applied. In this manner the saddle block and the clamp plate, jointly, form an annular clamp for the cylinder lil, as do also the saddle block 8 and the clamp frame if) periorr a like function for retaining the glass syringe 5.

For actuating the hydraulic pressure device I employ a screw bar 29, having a crank handle 3G, and the screw bar is threaded a rlxed nut or bearing 3l, the latter firmly secured to the base plate, with the axis of the screw alined with. the axis of the glass syringe and also with the 'position of Figure axis of the hydraulic pressure cylinder I4. The screw and its crank handle are conveniently located at one end of the base block, and the latter may be provided with a depression as 32 to accommodate the handle when the parts are stored Within the closed case or box formed by the base block and the cover or lid 2.

Before placing the pressure device in its holder, the stem il is grasped by the handle-head or knob i9, the nozzle 2G, or the coupling 2l if already in place, is inserted in water, and the stem il' is pulled back to the position oi Figure l to draw, by suction, a charge of water into the cylinder, the piston i8 now being in the dotted The spring clamp plate 2l is then lifted to permit insertion of the pressure device into its holder, and then the plato is released to clamp down on the cylinder nl and retain the hydraulic device in position. After the clamp frame i0 has been turned to dotted position in Figure 4, the glass syringe 5 is placed in position in its holder, the nozzle 'l of the syringe Vis kconnected with the coupling 2l, as described,

and the parts are thus prepared for the operation of the hydraulic device; the clamp frame is pressed, by hand, down on the syringe to hold the syringe, and of course the hydraulic cylinder i4 is held by its clamp plate 2l.

Before the hydraulic device is placed in position., the crank handle 30 is turned to back the screw 29 out of its nut, or threaded bearing, to the position in Figure 1, where the crank handle is readily accessible to and may be grasped by the right hand of the operator, while the left hand of the operator applies pressure on the clamping frame l0 to hold the syringe against displacement.

It will be apparent that by turningthe crank handle, the free end of the screw applies pressure against the head or knob I9 of the hydraulic pressure device, the stem ll and piston i8 are pushed into the cylinder I4 to compress the charge of water in the cylinder, and the pressure through the water is applied to or imposed against the near end of the plunger 6 of the syringe. As the fluid pressure is gradually applied the frozen plunger is freed, the syringe is removed, and is again ready for use. The hydraulic device may now be withdrawn from its holder, emptied in usual manner, and then replaced for storage. The crank handle is turned to bring it within the confines of the enclosure or box, the lid or cover is then closed, and the apparatus is put aside for future use.

From the above description taken in connection with my drawings it will be apparent that I have provided an apparatus, instrument or portable device by means of which the frozen plungers of syringes may with convenience, safety, and reliability, be freed from their cylinders to prolong their usefulness and maintain the instruments in proper working condition.

Asbefore stated, I have shown an exemplifying structure as the physical embodiment of my invention, and it will be understood that I contemplate making changes and alterations inthe disclosed apparatus, within the scope of my appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:-

1. The combination in an apparatus for freeing frozen plungers of syringes, with a. base, a support mounted on the base and means for retaining the syringe on said support, an alined support mounted on the base and means for retaining a iiuid pressure generating device on this support, a detachable coupling between the syringe and the device, and means for operating said device whereby fluid pressure is imposed against the frozen plunger.

2. The combination in an apparatus for freeing frozen plungers of syringes, with a base, a support mounted on the base and a flexible, hinged, clamping frame mounted on thev support for retaining the syringe in operative position, a second, alined support on the base, a Huid pressure generating device mounted in the second support and means for retaining said device in its support, a detachable coupling between the device and the syringe, and means for operating said device for imposing pressure against the frozen plunger.

3. The combination in an apparatus for freeing frozen plungers of syringes, with ya base, a grooved syringe-holder mounted on the base and a hinged clamping frame mounted on the holder to retain the syringe, a grooved support alined with the holder, a fluid pressure generating device `including a cylinder and its piston and mounted in said support, a spring-clamp mounted on the support for retaining the device, a detach-A able coupling between the device and the syringe, a screw bar mounted on the base for advancing said piston, and means for turning the screw bar for imposing uid pressure against the frozen plunger.

4. In a fluid pressure device of the character described the combination with ra support, a syringe having a nozzle and means for retaining the syringe on the support, of a fluid pressure generating cylinder having a nozzle, a detachable coupling having a socket to receive the syringenozzle, a nipple on said coupling for attachment to the nozzle of the cylinder, a piston in the cylinder and a stem for they piston, and actuating means 'co-acting with said stem for imposing uid pressure against the Vfrozen plunger of the 20 syringe. f

kKENNETH W. NICKERSON. 

